CN102455685A - Method for monitoring rotary shaft rotation speed fluctuation in machine tool, monitor apparatus, and machine tool - Google Patents

Method for monitoring rotary shaft rotation speed fluctuation in machine tool, monitor apparatus, and machine tool Download PDF

Info

Publication number
CN102455685A
CN102455685A CN2011103988739A CN201110398873A CN102455685A CN 102455685 A CN102455685 A CN 102455685A CN 2011103988739 A CN2011103988739 A CN 2011103988739A CN 201110398873 A CN201110398873 A CN 201110398873A CN 102455685 A CN102455685 A CN 102455685A
Authority
CN
China
Prior art keywords
mentioned
rotational speed
change
turning axle
lathe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2011103988739A
Other languages
Chinese (zh)
Other versions
CN102455685B (en
Inventor
吉野清
石井肇
西村浩平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okuma Corp
Original Assignee
Okuma Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010235720A external-priority patent/JP5507410B2/en
Priority claimed from JP2010237704A external-priority patent/JP2012086347A/en
Priority claimed from JP2010284815A external-priority patent/JP5674449B2/en
Application filed by Okuma Corp filed Critical Okuma Corp
Publication of CN102455685A publication Critical patent/CN102455685A/en
Application granted granted Critical
Publication of CN102455685B publication Critical patent/CN102455685B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/12—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/10—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting speed or number of revolutions

Abstract

In suppressing chatter vibration of a rotary shaft in a machine tool by fluctuating rotation speed of the rotary shaft, easy setting of a fluctuation parameter is realized. In a monitor apparatus of the machine tool, a graph showing a fluctuation amplitude of the rotation speed is displayed. On this graph, a current fluctuation position (first point) is indicated by a black circle marker, and also, a power limit line L of a motor fluctuation period is depicted based on a predetermined equation. In an area not exceeding the power limit line L, a new fluctuation position (second point) having a larger fluctuation amplitude and a shorter fluctuation period than the current fluctuation position is calculated and indicated with an arrow A guiding this new point from the current fluctuation position.

Description

Turning axle rotational speed change method for monitoring in the lathe and monitoring arrangement, lathe
Technical field
The present invention relates to keep watch on method for monitoring and the monitoring arrangement and the lathe of the rotational speed upset condition of turning axle in the lathe; This lathe has the instrument of being equipped with or workpiece and the turning axle through motor driven, and the rotational speed of this turning axle can be according to mode continuous ground change arbitrarily.
Being undertaken under the situation of cut,, then tend to produce so-called " flutter " if the rigidity of instrument or workpiece is low by lathe with the instrument of being equipped with or workpiece and the turning axle through motor driven.If the generation flutter, the instrument that then can produce is damaged or make the problems such as surface accuracy deterioration of workpiece.With regard to this flutter, produce phase delay through between the fluctuating before the commentaries on classics that on machined surface, produced 1 circle and the vibration that causes because of current cutting, make the thickness variation that cuts of workpiece thus, vibrate expansion.
As the technology that suppresses this flutter, the countermeasure of patent documentation 1 and patent documentation 2 is proposed.Patent documentation 1 with the technology of patent documentation 2 records is: according to the rotational speed change that predetermined change amplitude and variable cycle make turning axle, make the input of power of the change that cuts thickness irregular, thus the inhibition flutter.
Technical literature formerly
Patent documentation
Patent documentation 1:JP spy opens clear 49-105277 communique
The real public clear 61-3522 communique of patent documentation 2:JP
The problem that invention will solve
But; For patent documentation 1 method with patent documentation 2 records, in order to make the rotational speed change, need to set change amplitude and these two parameters of variable cycle (below; Under the situation of not distinguishing two parameters; Be referred to as " change value "), therefore there is following problem:, be difficult to judge for not knowing that which parameter of change is reasonable, the operating personnel of lack of experience.
In addition, even there is the rotational speed change that will make turning axle, still can't be through the amplitude of having imported, the situation that the cycle realizes.This be because; The value that the amplitude of rotational speed is obtained divided by setting rotational speed is as change amplitude Q; The rate of change such as the following formula (1) of the rotational speed that this change amplitude Q is obtained divided by cycle R are represented, and cutting torque Tc that the cutting of the inertia J (confirming according to turning axle itself, chuck (chuck), machined object etc.) through rotating part, turning axle torque T, machined object is required and the function of rotational speed S are represented:
Q R = 1500 πSJ ( T - T C ) . . . ( 1 )
In addition, if make the above current direction of allowance be used to make the motor of turning axle rotation, then motor can generate heat and damage, and has therefore stipulated the upper limit of input electric power, therewith concomitantly, has limited the turning axle torque.In addition, can know also that only deducting the torque of cutting torque Tc and obtaining from the main shaft torque can be to the change generation effect of rotational speed according to above-mentioned formula (1).Therefore, set in the cycle for a short time even for the rate of change Q/R that increases rotational speed amplitude setting is got senior general, the turning axle torque also must surpass limits value, consequently, can produce the situation that becomes the state that can not realize.In addition, because the shape of machined object is directed against each goods and difference, so inertia J is a variable.That is,, therefore be difficult to illustrate clearly the amplitude that can set and the scope in cycle because the upper limit of the rate of change of rotational speed also confirms uniquely but be unclear.
Therefore, according to through amplitude and cycle being set at the above-mentioned prior art that parameter makes the rotational speed change, exist the operator can't easily realize problem to the change of the effective rotational speed of inhibition of flutter.
Summary of the invention
Therefore; The present invention be directed to the problems referred to above makes; Its purpose is to provide method for monitoring and the monitoring arrangement and the lathe of the turning axle rotational speed in the lathe, in this lathe, according to arbitrary patterns (pattern) the turning axle rotational speed is changed continuously; The change value of rotational speed change can be easily selected to be used to make, the processing conditions of the inhibition of flutter can be found to be suitable for most.
Be used to solve the technical scheme of problem
To achieve these goals, the invention of technical scheme 1 is a kind of method for monitoring, and wherein, lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; Above-mentioned method for monitoring is kept watch on the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit carried out through display part in above-mentioned lathe; It is characterized in that above-mentioned method for monitoring is carried out following steps:
The mapping step is shown in above-mentioned display part with the change figure of the relation of change amplitude and the variable cycle of the above-mentioned rotational speed of expression; The 1st step display shows current changing position in above-mentioned change figure; Electric power critical line step display makes the electric power critical line of the variable cycle of said motor according to following formula (2), and it is shown on the above-mentioned change figure:
Q = 45000 π 2 S 2 J ( P - Pc ) R . . . ( 2 )
Q: rotational speed change amplitude [%]
R: rotational speed variable cycle [s]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
On the basis of the structure of technical scheme 1; The invention of technical scheme 2 is characterised in that; Above-mentioned method for monitoring is also carried out following steps: the changing position calculation procedure; In the scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become new changing position big and/or that above-mentioned variable cycle shortens with current changing position; With the 2nd step display, with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
To achieve these goals, the invention of technical scheme 3 is a kind of method for monitoring, and wherein, lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; Above-mentioned method for monitoring is kept watch on the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit carried out through display part in above-mentioned lathe; It is characterized in that above-mentioned method for monitoring is carried out following steps:
The mapping step is shown in above-mentioned display part with the change figure of the relation of change amplitude and the angular acceleration of the above-mentioned rotational speed of expression; The 1st step display shows current changing position in above-mentioned change figure; With; Electric power critical line step display makes the electric power critical line of the variable cycle of said motor according to following formula (4), and it is shown on the above-mentioned change figure:
ω · = 30 πSJ ( P - P C ) . . . ( 4 )
Figure BSA00000628634100033
Angular acceleration [rad/s 2]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
On the basis of the structure of technical scheme 3; The invention of technical scheme 4 is characterised in that; Above-mentioned method for monitoring is also carried out following steps: the changing position calculation procedure; In the scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become the big new changing position of big and/or above-mentioned angular acceleration change with current changing position; With the 2nd step display, with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
On the basis of the structure of technical scheme 2 or 4, the invention of technical scheme 5 is characterised in that, makes above-mentioned new changing position be the position on the change amplitude above-mentioned electric power critical line identical with above-mentioned current changing position.
On the basis of the structure of technical scheme 2 or 4, the invention of technical scheme 6 is characterised in that, makes above-mentioned new changing position be maximum position for above-mentioned change amplitude on above-mentioned electric power critical line.
To achieve these goals, the invention of technical scheme 7 is a kind of monitoring arrangement, and wherein, lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; Above-mentioned monitoring arrangement monitoring arrangement possesses display part so that the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit was carried out is kept watch in above-mentioned lathe; It is characterized in that above-mentioned monitoring arrangement possesses:
The mapping unit, its change figure of relation that will represent change amplitude and the variable cycle of above-mentioned rotational speed is shown in above-mentioned display part; The 1st display unit, it shows current changing position in above-mentioned change figure; With electric power critical line display unit, it makes the electric power critical line of the variable cycle of said motor according to following formula (2), and it is shown on the above-mentioned change figure:
Q = 45000 π 2 S 2 J ( P - Pc ) R . . . ( 2 )
Q: rotational speed change amplitude [%]
R: rotational speed variable cycle [s]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
On the basis of the structure of technical scheme 7; The invention of technical scheme 8 is characterised in that; Above-mentioned monitoring arrangement also possesses: the changing position computing unit; In its scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become new changing position big and/or that above-mentioned variable cycle shortens with current changing position; With the 2nd display unit, it is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
To achieve these goals, the invention of technical scheme 9 is a kind of monitoring arrangement, wherein, possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; Above-mentioned monitoring arrangement possesses display part so that the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit was carried out is kept watch in above-mentioned lathe, it is characterized in that above-mentioned monitoring arrangement possesses:
The mapping unit, its change figure of relation that will represent change amplitude and the angular acceleration of above-mentioned rotational speed is shown in above-mentioned display part; The 1st display unit, it shows current changing position in above-mentioned change figure; With electric power critical line display unit, it makes the electric power critical line of the variable cycle of said motor according to following formula (4), and it is shown on the above-mentioned change figure:
ω · = 30 πSJ ( P - P C ) . . . ( 4 )
Figure BSA00000628634100052
Angular acceleration [rad/s 2]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
On the basis of the structure of technical scheme 9; The invention of technical scheme 10 is characterised in that; Above-mentioned monitoring arrangement also possesses: the changing position computing unit; In its scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become the big new changing position of big and/or above-mentioned angular acceleration change with current changing position; With the 2nd display unit, it is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
The invention of technical scheme 11 is characterised in that, on the basis of technical scheme 8 or 10 described structures, above-mentioned new changing position is the position on the change amplitude above-mentioned electric power critical line identical with above-mentioned current changing position.
The invention of technical scheme 12 is characterised in that, on the basis of the structure of technical scheme 8 or 10, above-mentioned new changing position is that above-mentioned change amplitude is maximum position on above-mentioned electric power critical line.
To achieve these goals, the invention of technical scheme 13 is a kind of lathe, and it possesses the instrument of being equipped with or workpiece and the turning axle through motor driven; Rotational speed change unit with the rotational speed of this turning axle is changed continuously is characterized in that above-mentioned lathe possesses the monitoring arrangement of the described turning axle rotational speed of claim 7.
To achieve these goals, the invention of technical scheme 14 is a kind of lathe, possesses the instrument of being equipped with or workpiece and the turning axle through motor driven; To the change amplitude of the rotational speed of this turning axle and the change value setup unit that variable cycle is set; The rotational speed change unit of the rotational speed of above-mentioned turning axle being controlled with the change amplitude that sets according to this change value setup unit and variable cycle; It is characterized in that; Above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle, and sets above-mentioned change amplitude and variable cycle simultaneously according to this ratio.
On the basis of the structure of technical scheme 14; The invention of technical scheme 15 is characterised in that; Above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle according to the specified output of said motor, cutting output, with respect to usage ratio, the mean value of above-mentioned rotational speed and the inertia of above-mentioned turning axle of the specified output of said motor.
On the basis of the structure of technical scheme 15, the invention of technical scheme 16 is characterised in that above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle according to following formula (5):
Q R = 45000 π 2 S 2 J ( 0.01 ePn - Pc ) . . . ( 5 )
Q: the change amplitude [%] of rotational speed
R: the variable cycle of rotational speed [s]
S: the mean value [min of rotational speed -1]
J: the inertia [kgm of turning axle 2]
Pn: the specified output [W] of motor
Pc: cutting output [W]
E: usage ratio [%].
On the basis of any one structure in technical scheme 14～16; The invention of technical scheme 17 is characterised in that; Above-mentioned change value setup unit possesses the display unit that the curve map to the relation of representing above-mentioned change amplitude and variable cycle shows, on above-mentioned curve map, shows the position of current above-mentioned change amplitude and variable cycle and the related straight line of ratio of above-mentioned change amplitude and variable cycle respectively.
To achieve these goals; The invention of technical scheme 18 is a kind of lathe; Possesses the turning axle that is used to make instrument or Workpiece Rotating; And possess the rotational speed that can make turning axle and change the unit according to the rotational speed of predetermined amplitude and cyclical swing; It is characterized in that above-mentioned lathe possesses setup unit, above-mentioned setup unit with the turning axle torque of above-mentioned amplitude or any side in the above-mentioned cycle and above-mentioned turning axle or to any side of the input electric power of the motor input that is used for making above-mentioned turning axle rotation as parameter; And can set the value of each parameter, the value of the above-mentioned parameter that above-mentioned rotational speed volatility unit sets according to above-mentioned setup unit makes the rotational speed change of above-mentioned turning axle.
On the basis of the structure of technical scheme 18; The invention of technical scheme 19 is characterised in that; Above-mentioned rotational speed change unit makes the absolute value of the angular acceleration under the value according to the above-mentioned parameter of setting absolute value that makes the angular acceleration under the situation that the rotational speed of above-mentioned turning axle quickens and the situation that makes its deceleration consistent on one side, Yi Bian rotational speed is changed.
The invention of technical scheme 20 is characterised in that; In technical scheme 18 or 19 described inventions; Above-mentioned lathe possesses display unit, in this display unit, but on the plane that with each above-mentioned parameter is axle respectively, shows the regions and/or the currency of each above-mentioned parameter.
On the basis of the invention of technical scheme 18, the invention of technical scheme 21 is characterised in that above-mentioned lathe possesses: the 1st selected cell, and it is to selecting above-mentioned amplitude or in the above-mentioned cycle which side as above-mentioned parameter; And/or the 2nd selected cell, it is to selecting as above-mentioned parameter with the turning axle torque of above-mentioned turning axle or to which side of the input electric power of the motor input that is used for making above-mentioned turning axle rotation.
On the basis of the invention of technical scheme 18, the invention of technical scheme 22 is characterised in that above-mentioned lathe possesses the storage unit that the value of the above-mentioned parameter of setting through above-mentioned setup unit is stored.
The invention effect
According to technical scheme 1,3 and 7,9,13 described inventions; Even have change amplitude and these two setting values of variable cycle; Operating personnel still can be according to current changing position and the electric power critical line on the change figure, the setting value of easily selecting to be used to make the rotational speed of turning axle to change.
According to technical scheme 2,4 and 8,10 described inventions, except having above-mentioned effect, also can calculating and guiding through new changing position show, find to be suitable for most the processing conditions of the inhibition of flutter fast and simply.
According to technical scheme 5 and 11 described inventions; Except having above-mentioned effect, because variable cycle is short, so the Flutter Suppression effect is big; In addition; Because the change amplitude is identical, so the difference of the maximal value of cutting speed and minimum value is constant, and can make the deterioration because of the surface accuracy that difference produced of cutting speed is irreducible minimum.
According to technical scheme 6 and 12 described inventions, can expect big inhibition effect to flutter.
According to technical scheme 14 described inventions, can set change amplitude and two parameters of variable cycle simultaneously through 1 action.Therefore, it doesn't matter with what of experience, and operating personnel can easily set the change value of the rotational speed change that makes turning axle.
According to technical scheme 15 and 16 described inventions, except having above-mentioned effect, the change value can under the not excessive situation of the electric current that flows through motor, be set, the generation that the heat that has suppressed to accompany with the heating of motor is shifted.
According to technical scheme 17 described inventions, the described effect of any one in the scheme of possessing skills 14～16, can also easily discern current change value and change value after changing through curve map, can change the setting of value more simply.
According to technical scheme 18 described inventions; Possesses setup unit; This setup unit with the turning axle torque of amplitude or any side in the cycle and turning axle or to any side of the input electric power of the motor input that is used for making above-mentioned turning axle rotation as parameter; And can set the value of each parameter, the value of the parameter that rotational speed volatility unit sets according to setup unit makes the rotational speed change of turning axle.Therefore; With amplitude and cycle is different as the prior art of parameter, at least to the turning axle torque, the input electrical power limit maximal value, thus; The scope of the clear and definite parameter that can set; Like this, the operator can not set the evolutionary mode that can not realize, can easily realize the change to the effective rotational speed of inhibition of flutter.
According to technical scheme 19 described inventions; Because rotational speed change unit makes the absolute value of the angular acceleration under the value according to the pattern of setting absolute value that makes the angular acceleration under the situation that the rotational speed of turning axle quickens and the situation that makes its deceleration consistent on one side; Make the rotational speed change on one side, therefore can make the rotational speed change according to certain cycle.
According to technical scheme 20 described inventions; Has display unit; In this display unit; But the regions and/or the currency that on the plane that with each parameter is axle respectively, show each parameter, so the operator can hold current situation easily, the zone that can not set etc., can further seek the inhibition of flutter effectively.
According to technical scheme 21 described inventions; Since possess to the 1st selected cell that amplitude or in the cycle which side are selected as parameter and/or, to the turning axle torque of turning axle or the 2nd selected cell that which side of the input electric power of the motor input that is used for making the turning axle rotation selected as parameter, so ease of use is good.
According to technical scheme 22 described inventions owing to possess the storage unit that the value of the parameter that sets through setup unit is stored, therefore, can the setting value of each parameter be preserved as machine data bank, can next time later add the reference in man-hour.
Description of drawings
Fig. 1 is the summary structural drawing of the NC lathe of mode 1;
Fig. 2 is the key diagram of the change example of the main axis rotation speed of expression mode 1;
Fig. 3 is the process flow diagram of the method for monitoring of mode 1;
Fig. 4 is the key diagram of the monitor demonstration of expression mode 1;
Fig. 5 is the key diagram of experimental result of change of the main axis rotation speed of mode 1;
Fig. 6 is the key diagram of the change example of the monitor demonstration of expression mode 1;
Fig. 7 is the key diagram of the monitor demonstration of expression mode 2;
Fig. 8 is the key diagram of the change example of the monitor demonstration of expression mode 2;
Fig. 9 is the key diagram of the upset condition of the rotational speed of expression mode 3 and main shaft torque;
Figure 10 is the key diagram of the demonstration of the monitor of expression mode 3;
Figure 11 is the summary structural drawing of the NC lathe of mode 4;
Figure 12 is the key diagram of an example of the display mode of the information of the parameter in the change value configuration part of expression mode 4.
Label declaration
1,30:NC lathe;
2: main spindle box;
3: main shaft;
4: chuck;
5: pawl;
6: motor;
7: scrambler;
8,31: the main shaft control part;
The 9:NC device;
10: memory storage;
11,34: change value configuration part;
12: monitor;
13: monitoring arrangement;
W: workpiece;
L: electric power critical line;
A, B: arrow;
20: curve map;
21: a left side is down towards arrow button;
22: upper right towards arrow button;
23: window;
M: mark;
L1, L2: straight line;
32: Machine-Tool Control portion.
Embodiment
According to accompanying drawing, embodiment of the present invention is described below.
(mode 1)
Fig. 1 is the summary structural drawing as the NC lathe 1 of an example of lathe.In NC lathe 1; On main spindle box 2, be supported with main shaft 3 with rotation mode axle freely as turning axle, this main shaft 3 is via chuck 4 and pawl 5 grasping workpiece W; Inside at main spindle box 2; Be built-in with the motor 6 and scrambler 7 of rotation driving main shaft 3, this scrambler 7 is fixed on the main spindle box 2, detects the rotational speed of main shaft 3.
Label 8 expression main shaft control parts; It is connected with scrambler 7 with motor 6; Label 9 expressions provide the NC device of the instruction of rotational speed to main shaft control part 8; Main shaft control part 8 is adjusted the input electric power of supplying with to motor 6 according to following mode, and this mode is: in the rotational speed of keeping watch on the main shaft 3 that detects from scrambler 7 at ordinary times, the rotational speed of instructing according to NC device 9 makes main shaft 3 rotations.
In addition, on NC device 9, be connected with the storage part 10 of storage job sequence etc. and have change value configuration part 11 as the monitor 12 of display part.NC device 9 moves not shown instrument according to being stored in that job sequence in the storage part 10 makes main shaft 3 rotations and transporting along the turning axle direction of workpiece W and radial direction, carries out cut thus.
In addition; Here; The rotational speed of main shaft 3 is changed amplitude and variable cycle, is input to change value configuration part 11 from the monitor 12 with input block with it; Thus, can be via NC device 9 and such rotational speed change that makes main shaft 3 according to the change amplitude and the variable cycle of appointment shown in main shaft control part 8 image patterns 2.Thereby NC device 9, change value configuration part 11 become rotational speed change unit, increase storage part 10 above that and form monitoring arrangement 13 with monitor 12.
Through the process flow diagram of Fig. 3, the method for monitoring of the main axis rotation speed of this monitoring arrangement 13 is described.
At first, when in step S1, during to change value configuration part 11 input change amplitudes and variable cycle, then in step S2, making change figure shown in Figure 4 and be shown to monitor 12 (the 1st step display).Here, as being the longitudinal axis with the change amplitude that is used to make the rotational speed change, being that the curve map of the change amplitude-variable cycle of transverse axis shows with the variable cycle.In this curve map, the setting value of current change amplitude-variable cycle (current changing position) demonstrates through the bullet mark as the 1st in the lump.Directly point to the optional position on (point) this curve map through operating personnel, perhaps, thus, can change each setting value that changes amplitude and variable cycle through the numerical value of input change amplitude and variable cycle respectively such as not shown ten key.
Then, in step S3, on curve map, show electric power critical line L (electric power critical line step display).For motor 6, if flow through excessive electric current, then can generate heat, damage, so stipulated the upper limit of input electric power.Thus, even the change amplitude setting of rotational speed is got greatly, sets variable cycle little, also there is the situation that can't change according to setting value.Therefore, in the earthquake value configuration part 11, through following formula (2) calculate the variable change amplitude that can confirm according to the maximum of motor 6 input electric power and variable cycle critical line, be the electric power critical line L of variable cycle, it is shown on the curve map.Than this electric power critical line L scope on the right side, represented as setting value, to make the situation of rotational speed change.Formula (2) has been represented: the electric power that can caused loss such as the friction that deduct cutting and/or main axis rotation from the maximum of motor 6 input electric power be obtained is used for the change of main axis rotation speed.
Q = 45000 π 2 S 2 J ( P - Pc ) R . . . ( 2 )
Q: rotational speed change amplitude [%]
R: rotational speed variable cycle [s]
S: main axis rotation speed [min -1]
J: the inertia [kgm of main shaft 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power
On the other hand, well-known as illustrated in the background technology, if make the rotational speed change of main shaft 3, then can obtain to suppress the effect of flutter.Fig. 5 makes the rotational speed of main shaft 3 change the experimental result when carrying out cut, can know that according to this figure under the situation that the earthquake cycle is short, the change amplitude is big, the inhibition effect of flutter is big more.
Therefore; In step S4; For change value configuration part 11; Except as the 1st of current changing position, also calculate variable cycle in the scope on the right side of the electric power critical line in earthquake cycle and be shorter than the 1st point and change amplitude, and the changing position that obtains is demonstrated with white round dot mark on curve map as the 2nd greater than the 1st new changing position (changing position calculation procedure); And, also shown from the 1st o'clock arrow A (the 2nd step display) towards the 2nd as the guiding demonstration.In addition, here, the 2nd numerical value is shown as recommendation on the right side of curve map.
Therefore, operating personnel can easily set the high new changing position of possibility that can suppress flutter with reference to the arrow A that on curve map, shows and at the 2nd.
In addition; Calculating for the 2nd; Can carry out so as follows: for example calculate from the 1st position the straight line that extends to short cycle side and big amplitude side according to predefined gradient, add predefined rich degree and confirm in the inboard of electric power critical line L from the intersection point of this straight line and electric power critical line L; Perhaps calculate a plurality of changing positions that change change amplitude and variable cycle according to predefined ratio from the 1st, below electric power critical line L, select changing position near electric power critical line L from the changing position of acquisition.
Like this; According to the monitoring arrangement 13 of the main axis rotation speed of aforesaid way 1, change value configuration part 11 is as implementing above-mentioned method for monitoring like lower unit: will represent that the curve map of relation of change amplitude and the variable cycle of rotational speed is shown to the mapping unit of monitor 12; The 1st display unit that on curve map, shows current changing position (the 1st point); Make electric power critical line L and the electric power critical line display unit that on curve map, shows of the variable cycle of motor 6 according to formula (2); In the scope below electric power critical line L, calculating compares the change amplitude and becomes changing position computing unit big and the new changing position (the 2nd point) that variable cycle shortens with current changing position; With new changing position with the arrow A with respect to the change channeling conduct of current changing position is presented at the 2nd display unit on the curve map.Thus, even have change amplitude and these two setting values of variable cycle, operating personnel also can easily select to be used to make the setting value of rotational speed change.Therefore, can find to be suitable for most suppressing the processing conditions of flutter fast and simply.
In addition, in aforesaid way 1, calculate and channeling conduct that change amplitude and variable cycle all change at the 2nd, still, the guiding that also can make the change amplitude necessarily and only make variable cycle become short.For example, that kind as shown in Figure 6, with on the electric power critical line L of change amplitude, variable cycle identical with the 1st o'clock as the 3rd point, demonstration is from the 1st o'clock arrow A to the guiding of the 3rd introducing, and the 3rd numerical value is shown as recommendation.Here, the 3rd variable cycle can be tried to achieve through the change amplitude that makes the 1st of formula (2) distortion and substitution.
Like this; Make new changing position be the position on the change amplitude electric power critical line identical with current changing position, then because variable cycle is short, so the Flutter Suppression effect is big; In addition; Because the change amplitude is identical, so the difference of the maximal value of cutting speed and minimum value do not change, can make the deterioration of the surface accuracy that the difference because of cutting speed produces is irreducible minimum.
But, in Fig. 6, also shown the arrow of following guiding for the situation that can't suppress flutter at the 3rd.That is, the intersection point of the electric power critical line L of variable cycle and maximum change amplitude as the 4th point, is shown that from the 3rd o'clock arrow B towards the 4th guiding the 4th variable cycle can be tried to achieve through the value that makes formula (2) distortion and the maximum change of substitution amplitude.If with the 4th and the 3rd comparison, then exist the difference of cutting speed to become possibility big, that machined surface worsens, still, owing to the change amplitude is big, the effect that therefore suppresses flutter is big.In addition, in order directly to obtain the Flutter Suppression effect, also can omit the 3rd and show with the 1st to be that starting point is the arrow of terminal point with the 4th.
Like this, make new changing position, then can expect big inhibition effect flutter for the maximum position of change amplitude on electric power critical line L.
(mode 2)
Describe in the face of other type of the present invention down.But owing to comprise that the order of summary structure, method for monitoring of the NC lathe 1 of monitoring arrangement 13 is identical with mode 1, the mode that the monitor in the only change value configuration part 11 shows is different, therefore omits the explanation of repetition, is shown as the master and describes with monitor.
In aforesaid way 1, the change value has adopted variable cycle, still, even the angular acceleration of the rotation through main shaft 3 can make the rotational speed change of main shaft 3 too and keeps watch on.Angular acceleration is the variable quantity of the rotational speed of unit interval, and the rotational speed S of main shaft 3 and variable cycle R, change amplitude Q have the relation shown in the following formula (3).Through Fig. 5 the big situation of effect of Flutter Suppression under the short situation of earthquake cycle has been described, yet, identical with the situation that shortens variable cycle, even increase the effect that angular acceleration also can increase Flutter Suppression.
ω · = πS 1500 R Q . . . ( 3 )
Angular acceleration [rad/s 2]
Therefore, in this monitoring arrangement 13, when input changed amplitude and angular acceleration in the earthquake value configuration part 11, then change value configuration part 11 made change figure shown in Figure 7 and it is shown to (the 1st step display) in the monitor 12.Here, demonstration is the longitudinal axis, is the curve map of the change amplitude-angular acceleration of transverse axis with the angular acceleration with the change amplitude.
In addition, in this curve map, according to formula (2) and (3), the electric power critical line L of angular acceleration calculates also according to following formula (4) equally, and is shown in (electric power critical line step display) on the curve map.In the scope of the side that can keep left at electric power critical line L, as setting value, make the rotational speed change than this angular acceleration.
ω · = 30 πSJ ( P - P C ) . . . ( 4 )
In addition, change value configuration part 11 shows the 5th point that becomes current changing position through the bullet mark.In addition; In the scope in the left side of the electric power critical line L of angular acceleration; Calculate angular acceleration greater than the 5th point and change amplitude new changing position (changing position calculation procedure) greater than the 5th; The changing position that obtains is shown through white round dot mark on curve map as the 6th, and also show from the 5th o'clock arrow A (the 2nd step display) towards the 6th as the guiding demonstration.In addition, here, the 6th numerical value is shown as recommendation on the right side of curve map.
Therefore, operating personnel can easily set the high changing position of possibility that can suppress flutter with reference to the arrow A that in curve map, shows and at the 6th.
Like this; In the monitoring arrangement 13 of the main axis rotation speed of aforesaid way 2; Same change value configuration part 11 is as carrying out above-mentioned method for monitoring like lower unit: the unit of mapping, and its curve map of relation that will represent change amplitude and the angular acceleration of rotational speed is shown in the monitor 12; The 1st display unit, it shows current changing position (the 5th point) in curve map; Electric power critical line display unit, it makes the electric power critical line L of the variable cycle of motor 6 according to formula (4), and it is shown on the curve map; The changing position computing unit calculates the change amplitude greater than current changing position and the angular acceleration new changing position (the 6th point) greater than current changing position in its scope below electric power critical line L; The 2nd display unit, its with new changing position with the arrow A with respect to the change channeling conduct of current changing position is presented on the curve map.Thus, even have change amplitude and these two setting values of variable cycle, operating personnel also can be prone to select to be used to make the setting value of rotational speed change with holding.Therefore, can find to be suitable for most suppressing the processing conditions of flutter fast and simply.
In addition, in this mode 2, the guiding that also can make the change amplitude necessarily and only make angular acceleration become bigger.For example, that kind as shown in Figure 8, with on the electric power critical line L of change amplitude, variable cycle identical with the 5th o'clock as the 7th point, demonstration is from the 5th o'clock arrow A to the guiding of the 7th introducing, and the 7th numerical value is shown as recommendation.
Like this; Make new changing position be the position on its change amplitude electric power critical line L identical with current changing position, because variable cycle is short, so the Flutter Suppression effect is big; In addition; Because the change amplitude is identical, so the difference of the maximal value of cutting speed and minimum value do not change, can make the deterioration of the surface accuracy that the difference because of cutting speed produces is irreducible minimum.
But, in Fig. 8, equally for situation that can't flutter at the 7th, also shown the arrow of following guiding.Promptly; The intersection point of the electric power critical line L of angular acceleration and maximum change amplitude as the 8th point, is shown from the 7th o'clock arrow B towards the 8th guiding, if the 8th is compared with the 7th; Then exist the difference of cutting speed to become possibility big, that machined surface worsens; But because the change amplitude is big, the effect that therefore suppresses flutter is big.In addition, same here, suppress the Flutter Suppression effect in order directly to obtain, can omit the 7th and demonstration is that starting point is the arrow of terminal point with the 8th with the 5th.
Like this, make new changing position, then can expect big inhibition effect flutter for the maximum position of change amplitude on electric power critical line L.
In addition; What mode 1,2 was common is that when in monitor, showing curve map, electric power critical line and new changing position, guiding arrow are also automatically calculated and show; But, also can they shown arbitrarily constantly respectively through the input block that is arranged in the change value configuration part.Certainly, the form of curve map also is not limited to foregoing, can make axle opposite or with changes such as three dimensional constitution demonstrations.
In addition, the demonstration of changing position is not limited to circle, also can select other shape mark, or change the shape of mark at current changing position and new changing position.In addition, the guiding demonstration also is not limited to arrow, as long as can suitably change to new changing position enlightenment, for example, the limit makes the mark flicker of current changing position, and the limit makes its demonstration of moving to new changing position repeatedly, or the like.
But; New changing position shows and need not be provided with guiding; Also; In monitor, only show current changing position and electric power critical line, operating personnel can at random select new changing position now according to become the direction that the change amplitude is big and/or variable cycle is short (or the change amplitude is big and/or angular acceleration is big) from current changing position below the electric power critical line.Even like this, operating personnel still can easily select to be used to make the setting value of rotational speed change according to current changing position on the curve map and electric power critical line.
In addition, in aforesaid way 1,2, the example that change amplitude and variable cycle or angular acceleration are all changed and only make variable cycle or the example of angular acceleration change is illustrated still, also can only make the change amplitude change.
On the other hand; In aforesaid way 1,2, process from making the rotational speed change at first, still; Thereby compare in the lathe of detecting unit generation, known that detects flutter being mounted with vibration that the vibration that detects main shaft through vibration transducer is obtained and predetermined threshold value; If make main axis rotation also through the generation of detection flutter according to the constant speed of setting at first, then also can be change amplitude and the variable cycle or the angular acceleration of earthquake value configuration part input rotational speed; Make rotational speed change thus, and in monitor, show change figure such as curve map.
(mode 3)
In this mode 3, same, the structure of NC lathe 1 is identical with mode 1,2; Monitor 12 is a display unit; Change value configuration part 11 is change value setup unit, changes amplitude and variable cycle to the rotational speed of change value configuration part 11 input main shafts 3 with it from the monitor 12 with input block, thus; Can be via NC device 9 and main shaft control part 8 as rotational speed change unit, that kind shown in the image pattern 9 makes change amplitude and the variable cycle change of the rotational speed of main shaft 3 according to appointment.
In addition; When input changes amplitude and variable cycle in the change value configuration part 11 here; That kind shown in the image pattern 10 then; In monitor 12, show with the change amplitude to be the longitudinal axis, to be curve Figure 20 of the change amplitude-variable cycle of transverse axis with the variable cycle, and show the setting value (current change value) of current change amplitude-variable cycle through bullet mark M.
In addition, in monitor 12, show a left side down towards arrow button 21 and upper right towards arrow button 22, when operating personnel carried out pressing operation to certain button, then moved along the direction of arrow of this button the position of mark M.Label 23,23 is the window of the numerical value of the change amplitude of the position that is presented at mark M respectively and variable cycle.
But the change amplitude of rotational speed and the ratio of variable cycle are set in change value configuration part 11, and set change amplitude and variable cycle simultaneously according to this ratio.Specifically; Make the ratio of change amplitude and variable cycle be specified output, cutting output according to motor 6; With respect to the inertia of the mean value of the usage ratio of the specified output of motor 6, rotational speed, main shaft 3 and the value of obtaining for example, can consider to satisfy the value of following formula (5).In addition, here, the reason of stipulating, change the output of motor 6 according to the ratio with respect to specified output is, if make the rotational speed change, it is many and make the heating of motor 6 become many, the possibility of heat displacement takes place then to have electric current in motor 6.
Q R = 45000 π 2 S 2 J ( 0.01 ePn - Pc ) . . . ( 5 )
Q: the change amplitude [%] of rotational speed
R: the variable cycle of rotational speed [s]
S: the mean value [min of rotational speed -1]
J: the inertia [kgm of main shaft 2]
Pn: the specified output [W] of motor
Pc: cutting output [W]
E: usage ratio [%]
If change Once you begin, then wherein cutting output Pc can calculate according to the main shaft torque in the change.Can know according to Fig. 9 to make rotational speed time and the relation of rotational speed and the relation of time and main shaft torque in when change, and can know the big torque of needs in the acceleration neutralization deceleration of the rotational speed of main shaft 3.For the main shaft torque of quickening in the neutralization deceleration, be that center amplitude up and down equates with the cutting torque.According to this situation, the cutting torque can be used as in the acceleration the main shaft torque with slow down in the main shaft torque intermediate value (mean value) and obtain.Owing between torque and output, have the relation of following formula (6), therefore can the cutting torque be scaled cutting output.In addition, though include the corresponding amount of abrasion loss that produces with the rotation of main shaft 3 in the value of obtaining, abrasion loss is little value, here omits.
P = 2 π 60 T . . . ( 6 )
P: the output of motor [W]
T: the torque of motor [Nm]
Make the cutting of obtaining like this be output as for example 2kW, specified output 8kW, inertia 0.5km 2, rotational speed 1500min -1, be output as 80% o'clock of specified output in the change, if the change amplitude is 20%, the variable cycle that then satisfies formula (5) is 1.1s.
In addition; In curve Figure 20, show the straight line L1 of the ratio of expression (5), for example upper right during when pushing towards arrow button 22; Then mark M moves and the corresponding amount of preassigned change amplitude towards cycle length and the big direction of amplitude along straight line L1, in window 23, shows the change value.For example, be 5% when making preassigned change amplitude, and push once upper rightly when arrow button 22 that then changing amplitude is 25%, variable cycle is 1.4s according to formula (5).When pushing not shown confirming button here, then the change value is exported to NC device 9, the rotational speed of main shaft 3 changes according to the change value that in window 23, shows.
Generally, under the identical situation of the output of motor 6, the change amplitude is big more, and the Flutter Suppression effect is big more, and still, if the change amplitude becomes big, then the velocity contrast during with low speed is big during high speed, so has the opposite relation that on machined surface, presents candy strip.Thus, preferably, operating personnel push upper right towards arrow button 22 under the situation that flutter takes place, and not taking place to push under the situation of flutter under the left side towards arrow button 21, adjust thus.
In addition, in the earthquake value configuration part 11, the variation of each parameter of syndrome (5) is calculated the ratio that changes amplitude and variable cycle again, changes straight line L1.For example, when the chipping allowance of work in-process workpiece W became big, then cutting output became big, so the slope of straight line L1 diminishes, and became straight line L2.If here; Push upper right towards arrow button 22; Then mark M is starting point M1 with the point (satisfying the point of the formula of calculating again (5)) that intersects according to current change amplitude and straight line B, and direction elongated along straight line L2 towards the cycle and that amplitude increases moves and the corresponding amount of preassigned change amplitude.
Like this; NC lathe 1 according to aforesaid way 3; The ratio of change amplitude and variable cycle is set in change value configuration part 11, and sets change amplitude and variable cycle simultaneously according to this ratio, can set change amplitude and these two parameters of variable cycle simultaneously through 1 time action thus.Therefore, operating personnel can irrespectively easily set the change value of the rotational speed change be used to make main shaft 3 with what of experience.
Particularly here; Because the ratio of change amplitude and variable cycle is set in change value configuration part 11 according to the specified output of having used motor 6, cutting output, with respect to the above-mentioned formula (5) of the inertia of the mean value of the usage ratio of the specified output of motor 6, rotational speed, main shaft 3; Therefore; Set the change value under the not excessive situation of the electric current that can in motor 6, flow, suppress to follow the heating of motor 6 to produce the heat displacement.
In addition; Change value configuration part 11 comprises the monitor 12 that the curve Figure 20 to the relation of expression change amplitude and variable cycle shows; In curve Figure 20, show the position (mark M) of current change amplitude and variable cycle and related straight line L1, the L2 of ratio of change amplitude and variable cycle respectively, thus; Can easily discern current change value and change after the change value, can change the setting of value more simply.
In addition, the ratio of change amplitude and variable cycle is not limited to the situation of above-mentioned formula (5).For example, be considered under roughly certain situation, when changing, also can change simultaneously according to the mode that satisfies following formula (7) according to exporting with current equal motor in cutting output.
Q R = k . . . ( 7 )
Q: the change amplitude [%] of rotational speed
R: the variable cycle of rotational speed [s]
K: constant
Constant k is obtained through substitution current change amplitude and variable cycle.If to pushing 1 time towards arrow button 22 towards arrow button 21 or upper right under the left side, then obtain constant k, become the change value that satisfies formula (7) according to current value.For example, move and the corresponding amount of preassigned change amplitude, and become the change value that satisfies formula (7) if push upper right towards arrow button 22, then long, the big direction of change amplitude along variable cycle.In this case, same, the straight line of formula (7) illustrates on curve map.
Like this; Be considered under roughly certain situation in cutting output, because the relation of change amplitude and variable cycle is the simple proportional formula, therefore; Even taking place also can obtain stable change value under the situation of deviation through pushing arrow button because of some reason cutting output.
In addition; In aforesaid way 3, when in monitor, showing curve map, mark and the related straight line of ratio of then representing current change value automatically calculated and shown; But, they are being shown respectively arbitrarily constantly.Certainly, the form of curve map also is not limited to foregoing, also can make axle opposite or with changes such as three dimensional constitution demonstrations.But the demonstration of the straight line that curve map, mark, ratio are related not necessarily also can only show current change value and change value after changing through numerical value.
On the other hand,, in monitor, select after the change value here; Again confirming button is carried out input operation, thus, the change of rotational speed is carried out in rotational speed change unit; But, also can be rotated the change of speed automatically with the selection interlock ground of change value.
(mode 4)
NC lathe 30 shown in Figure 11 also possesses the chuck 4 with pawl 5 at the end of main shaft 3.With main shaft 3 supporting in the main spindle box 2 that can rotate, be built-in with the motor 6 that is used to make main shaft 3 rotations and as the scrambler 7 of the rotational speed detecting unit of the rotational speed that is used to detect main shaft 3.
On the other hand, label 31 is the main shaft control parts as the rotational speed change unit of the rotational speed of the supply capability of motor 6 being controlled main shaft 3 through the rotational speed and the adjustment of scrambler 7 supervision main shafts 3.In addition; Label 32 is the Machine-Tool Control portions as the rotational speed change unit of the movement of control lathe 30 integral body; Itself and above-mentioned main shaft control part 31, and (promptly as the parameter that is used to set the rotational speed change that is used to make main shaft 3 as the storage part 33 of the storage unit of storage job sequence; Main shaft torque and amplitude) setup unit and change value configuration part 34 grades of selected cell be connected; Except rotational speed via main shaft control part 31 control workpiece W, with not shown instrument be cut into the surface of the workpiece W in the rotation and with workpiece W or instrument to the turning axle direction and/or radially transport such processing action, also can control through known structure.In addition, change value configuration part 34 constitutes as touch panel shown in 12, also plays a role as display unit.
In above-mentioned lathe 30; According to the job sequence that is stored in storage part 33, according to the control of main shaft control part 31 motor 6 is supplied power, make main shaft 3 according to predetermined setting rotational speed rotation; And instrument cut the surface of workpiece W, through carry out turning processing like these actions.Then, if in this processing, produce flutter, be that benchmark changes the rotational speed of main shaft 3 according to predetermined mode then with current rotational speed, realize the inhibition of flutter thus.Therefore, setting predetermined parameters in operator's earthquake value configuration part 34 gets final product.Like this, in Machine-Tool Control portion 32,, send instruction, in main shaft control part 31, make the rotational speed change of main shaft 3, thereby realize the inhibition of flutter according to this instruction to main shaft control part 31 in order to make the rotational speed change of main shaft 3 according to the parameter of setting.At this moment, also can constitute: directly import and the corresponding rotational speed of change to main shaft control part 31 from lathe control part 32, also can constitute: import electric power to motor 6 inputs accordingly with change.In addition, owing between input electric power P and main shaft torque T, have by the relation shown in the following formula (8), therefore, the instruction that also can send main shaft torque T to main shaft control part 31 from lathe control part 32, thereby the rotational speed of control main shaft 3.In addition, the S in the formula (8) representes rotational speed.
P = πS 30 T . . . ( 8 )
Here, with reference to Figure 12, a specific embodiment when making the rotational speed change as the torque of parameter setting main shaft and amplitude is described in detail.At first, be 200Nm by maximum principal axis torque to the allowance restriction of the input electric power of motor 6, be set at this 80Nm below maximum principal axis torque at this as the main shaft torque of one of parameter.In addition, the peak swing of rotational speed is 100%, is set at this 30% below peak swing at this as the amplitude of one of parameter.This setting is to carry out with "+", "-" that touch operation in earthquake such as finger value configuration part 34 is positioned at the bottom of this display frame through the operator.Like this, the value of setting shows as " " on the plane that with each parameter is the longitudinal axis and transverse axis in display frame.In addition, also the maximum principal axis torque is shown as straight line in the plane, but the regions of demonstration main shaft torque, and the operator can't set the main shaft torque above the maximum principal axis torque.
The value of setup parameter as above-mentioned; Then in Machine-Tool Control portion 32 with according to the main shaft torque that makes rotational speed when change be 80Nm and amplitude be 30% (; ± 15%) parameter value makes the mode of the rotational speed change of main shaft 3, and instruction is sent to main shaft control part 31 (at this moment, both can be as above-mentioned; Rotational speed as command value, also can or be imported electric power as command value with the main shaft torque).Therefore, for example, be 1000min setting rotational speed -1Situation under, main shaft control part 31 quickens the main shaft torque according to 80Nm, becomes+15% 1150min up to the rotational speed by scrambler 7 detected main shafts 3 -1At this moment, handle, obtain the angular acceleration of the main shaft 3 when quickening, and this angular acceleration is stored in Machine-Tool Control portion 32 temporarily through rotational speed being carried out differential.In addition, reach 1150min when rotational speed -1The time; The consistent mode of absolute value of the angular acceleration when then the absolute value of the angular acceleration of Machine-Tool Control portion 32 when slowing down is with acceleration; Send instruction to main shaft control part 31; In main shaft control part 31, the consistent mode of absolute value of the angular acceleration when quickening during with deceleration is controlled the main shaft torque, the rotational speed of main shaft is decelerated to-15% 850min -1Till.Then,, in Machine-Tool Control portion 32 and main shaft control part 31, carry out above-mentioned action repeatedly, and change the rotational speed of main shaft 3 in process finishing or before setting the value of new parameter.
As stated, make time and the relation of rotational speed and the relation of time and main shaft torque in rotational speed when change of main shaft 3 shown in Fig. 9.Can know according to Fig. 9, when the rotation that makes main shaft 3 is quickened and slow down, need big main shaft torque.Therefore; The absolute value of the angular acceleration of the main shaft 3 of the absolute value of the angular acceleration of the main shaft 3 when quickening through making during with deceleration is consistent; Thus, can be that the center equates the height of change main shaft torque with the cutting torque, or the acceleration time and the deceleration time of the rotational speed of main shaft 3 are equated.In addition, as above-mentioned, the cutting torque can be used as the intermediate value (mean value) of the main shaft torque of main shaft torque when slowing down when quickening and obtains.In addition; Can obtain the cycle that makes the rotational speed change according to the variation pattern of rotational speed, because amplitude and main shaft torque are known, therefore; Through with them, through scrambler 7 detected rotational speeies and above-mentioned cutting torque substitution formula (1), can calculate inertia J thus.Therefore, in the earthquake value configuration part 34, that kind shown in the image pattern 12 shows cutting torque, inertia and passes through main shaft control part 31 detected input electric power (consumes electric power).In addition, calculating inertial time, employing cycle and amplitude, but adopt the angular acceleration of main shaft 3 can calculate inertia too.
Lathe 30 according to above-mentioned that kind; With amplitude and cycle is different as the prior art of parameter; As parameter the rotational speed of main shaft 3 is changed the amplitude and the main shaft torque of rotational speed, that is, adopt the clear and definite main shaft torque of maximal value as parameter; Therefore, can be specifically shows at the scope of the parameter that can set in the change value configuration part 34 to the operator.Therefore, the operator does not set the evolutionary mode that can not realize, can easily realize the change to the effective rotational speed of inhibition of flutter.
In addition; Because in the earthquake value configuration part 34; Be amplitude with an axle, but another is regions and the currency that each parameter is shown on the plane of main shaft torque; Therefore the operator not only can hold current situation but also the zone that can not set of assurance easily, can realize the inhibition of flutter more effectively.
In addition,, therefore can the state of processing be held as numerical value, also can easily keep watch on consumed energy owing in the earthquake value configuration part 34, also cutting torque, inertia, input electric power are calculated or detect, show.
In addition; Though through making the rotational speed change on machined surface, produce inhomogeneous (む ら); But the operator can confirm the input electric power of demonstration in the earthquake value configuration part 34, in attainable scope, suppresses flutter, and; Owing to can seek the little variation pattern of the rate of change, amplitude of rotational speed, therefore can make the above-mentioned inhomogeneous irreducible minimum that rests on.
In addition, lathe of the present invention is not limited to the form of above-mentioned embodiment fully, can be in the scope that does not break away from aim of the present invention as required appropriate change be used to make parameter, change value configuration part, and the whole structure of lathe etc. of rotational speed change.
For example, in the above-described embodiment, the parameter as the rotational speed change that is used to make main shaft 3 has adopted amplitude and main shaft torque, but also can replace the main shaft torque and adopt input electric power.In this case, the input electric power substitution formula (8) that in Machine-Tool Control portion 32, will set changes to the main shaft torque thus, carries out the control identical with above-mentioned embodiment afterwards and gets final product.Owing in this control, also adopt the clear and definite input electric power of maximal value as parameter; Therefore; With amplitude is different as the prior art of parameter with the cycle setting, have the effects such as scope that can be specifically shows at the parameter that to set in the change value configuration part 34 to the operator.
In addition, but the parameter of being selected arbitrarily to import by the operator in the also earthquake value configuration part 34 is main shaft torque or input electric power, can improve ease of use through adopting this structure.
In addition, also can replace amplitude and adopt the cycle that makes the rotational speed change.Adopting under the situation in cycle, for example, in earthquake value configuration part 34, will be set at 2 seconds the cycle respectively, when the main shaft torque settings is 80Nm, then during 1 second of half period, the rotational speed of main shaft 3 is being quickened according to main shaft torque 80Nm.At this moment, identical with above-mentioned embodiment, in Machine-Tool Control portion 32, store angular acceleration.In addition, then, during 1 second of remaining half period, carry out according to the identical main shaft torque when quickening of the absolute value of angular acceleration, make the control of the rotational speed deceleration of main shaft 3.In addition, also identical in this control with above-mentioned embodiment, with amplitude is different as the prior art of parameter with the cycle setting, have the effects such as scope that can be specifically shows at the parameter that can set in the change value configuration part 34 to the operator.
In addition, but the parameter of certainly being selected arbitrarily to import by the operator in the also earthquake value configuration part 34 is amplitude or cycle, can improve ease of use through adopting this scheme.
In addition; Also can constitute in the following manner: even main shaft torque, input electric power are not imported as direct value; And the relative value of certain ratio of the torque of input maximum principal axis, maximum input electric power also has no problem; The various parameters of this setting are stored in storage part 33 with kind, the job sequence of instrument relatedly, next time add later on man-hour (based on same tool add man-hour, based on man-hour that adds of identical job sequence), from processing at first the rotational speed change that makes main shaft 3 according to form based on the value of the parameter of this setting; Thus, prevent the generation of flutter.
Also have,, also can in storage part 33, store setting value, the processing conditions value of the various parameters such as rotational speed, approach, cutting torque, inertia of the reality when changing except the main shaft torque set, input electric power, amplitude, the cycle.Through storage like this, can various values be preserved as machine data bank, can next time later add the reference in man-hour.
In addition, what modes was common is, the present invention is not limited to the NC lathe, and the lathe that carries out cut so long as make the rotational speed change gets final product, and for example, also comprises machining center (machining center) etc.

Claims (22)

1. the method for monitoring of the turning axle rotational speed of a lathe, wherein, above-mentioned lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; The method for monitoring of the turning axle rotational speed of above-mentioned lathe is the method for monitoring of in above-mentioned lathe, through display part the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit carried out being kept watch on; It is characterized in that
The method for monitoring of the turning axle rotational speed of above-mentioned lathe is carried out following steps:
The mapping step is shown in above-mentioned display part with the change figure of the relation of change amplitude and the variable cycle of the above-mentioned rotational speed of expression;
The 1st step display shows current changing position in above-mentioned change figure; With
Electric power critical line step display makes the electric power critical line of the variable cycle of said motor according to following formula, and it is shown on the above-mentioned change figure,
Q = 45000 π 2 S 2 J ( P - Pc ) R
Q: rotational speed change amplitude [%]
R: rotational speed variable cycle [s]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
2. the method for monitoring of the turning axle rotational speed of lathe according to claim 1 is characterized in that,
The method for monitoring of the turning axle rotational speed of above-mentioned lathe is also carried out following steps:
The changing position calculation procedure, in the scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become new changing position big and/or that above-mentioned variable cycle shortens with current changing position; With
The 2nd step display is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
3. the method for monitoring of the turning axle rotational speed of a lathe, wherein, above-mentioned lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; The method for monitoring of the turning axle rotational speed of above-mentioned lathe is the method for monitoring of in above-mentioned lathe, through display part the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit carried out being kept watch on; It is characterized in that
The method for monitoring of the turning axle rotational speed of above-mentioned lathe is carried out following steps:
The mapping step is shown in above-mentioned display part with the change figure of the relation of change amplitude and the angular acceleration of the above-mentioned rotational speed of expression;
The 1st step display shows current changing position in above-mentioned change figure; With
Electric power critical line step display makes the electric power critical line of the variable cycle of said motor according to following formula, and it is shown on the above-mentioned change figure,
ω · = 30 πSJ ( P - P C )
Figure FSA00000628634000022
Angular acceleration [rad/s 2]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
4. the method for monitoring of the turning axle rotational speed of lathe according to claim 3 is characterized in that,
The method for monitoring of the turning axle rotational speed of above-mentioned lathe is also carried out following steps:
The changing position calculation procedure, in the scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become the big new changing position of big and/or above-mentioned angular acceleration change with current changing position; With
The 2nd step display is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
5. the method for monitoring of the turning axle rotational speed of lathe according to claim 2 is characterized in that,
Make above-mentioned new changing position be the position on the change amplitude above-mentioned electric power critical line identical with above-mentioned current changing position.
6. the method for monitoring of the turning axle rotational speed of lathe according to claim 2 is characterized in that,
Make above-mentioned new changing position be maximum position for above-mentioned change amplitude on above-mentioned electric power critical line.
7. the monitoring arrangement of the turning axle rotational speed of a lathe, wherein, above-mentioned lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; The monitoring arrangement of the turning axle rotational speed of above-mentioned lathe is in above-mentioned lathe, to possess the monitoring arrangement of display part so that the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit was carried out is kept watch on; It is characterized in that
The monitoring arrangement of the turning axle rotational speed of above-mentioned lathe possesses:
The mapping unit, its change figure of relation that will represent change amplitude and the variable cycle of above-mentioned rotational speed is shown in above-mentioned display part;
The 1st display unit, it shows current changing position in above-mentioned change figure; With
Electric power critical line display unit, it makes the electric power critical line of the variable cycle of said motor according to following formula, and it is shown on the above-mentioned change figure,
Q = 45000 π 2 S 2 J ( P - Pc ) R
Q: rotational speed change amplitude [%]
R: rotational speed variable cycle [s]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
8. the monitoring arrangement of the turning axle rotational speed of lathe according to claim 7 is characterized in that,
The monitoring arrangement of the turning axle rotational speed of above-mentioned lathe also possesses:
The changing position computing unit, in its scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become new changing position big and/or that above-mentioned variable cycle shortens with current changing position; With
The 2nd display unit, it is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
9. the monitoring arrangement of the turning axle rotational speed of a lathe, wherein, above-mentioned lathe possesses: instrument or workpiece and the turning axle through motor driven are installed; With the rotational speed change unit that the rotational speed of this turning axle is changed continuously; The monitoring arrangement of the turning axle rotational speed of above-mentioned lathe is in above-mentioned lathe, to possess the monitoring arrangement of display part so that the upset condition of the above-mentioned rotational speed change above-mentioned rotational speed that the unit was carried out is kept watch on; It is characterized in that
The monitoring arrangement of the turning axle rotational speed of above-mentioned lathe possesses:
The mapping unit, its change figure of relation that will represent change amplitude and the angular acceleration of above-mentioned rotational speed is shown in above-mentioned display part;
The 1st display unit, it shows current changing position in above-mentioned change figure; With
Electric power critical line display unit, it makes the electric power critical line of the variable cycle of said motor according to following formula, and it is shown on the above-mentioned change figure,
ω · = 30 πSJ ( P - P C )
Figure FSA00000628634000042
Angular acceleration [rad/s 2]
S: turning axle rotational speed [min -1]
J: the inertia [kgm of turning axle 2]
P: the maximum input electric power [W] of motor
Pc: the total [W] of cutting electric power and loss electric power.
10. the monitoring arrangement of the turning axle rotational speed of lathe according to claim 9 is characterized in that, the monitoring arrangement of the turning axle rotational speed of above-mentioned lathe also possesses:
The changing position computing unit, in its scope below above-mentioned electric power critical line, calculating is compared above-mentioned change amplitude and is become the big new changing position of big and/or above-mentioned angular acceleration change with current changing position; With
The 2nd display unit, it is with above-mentioned new changing position, with the guiding with respect to the change channeling conduct of above-mentioned current changing position is shown in above-mentioned change figure.
11. the monitoring arrangement of the turning axle rotational speed of lathe according to claim 8 is characterized in that,
Above-mentioned new changing position is the position on the change amplitude above-mentioned electric power critical line identical with above-mentioned current changing position.
12. the monitoring arrangement of the turning axle rotational speed of lathe according to claim 8 is characterized in that,
Above-mentioned new changing position is that above-mentioned change amplitude is maximum position on above-mentioned electric power critical line.
13. a lathe, it possesses the instrument of being equipped with or workpiece and the turning axle through motor driven; Rotational speed change unit with the rotational speed of this turning axle is changed continuously is characterized in that,
Above-mentioned lathe possesses the monitoring arrangement of the described turning axle rotational speed of claim 7.
14. a lathe, it possesses the instrument of being equipped with or workpiece and the turning axle through motor driven; To the change amplitude of the rotational speed of this turning axle and the change value setup unit that variable cycle is set; Rotational speed change unit with the change amplitude that sets according to this change value setup unit and variable cycle are controlled the rotational speed of above-mentioned turning axle is characterized in that,
Above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle, and sets above-mentioned change amplitude and variable cycle simultaneously according to this ratio.
15. lathe according to claim 14 is characterized in that,
Above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle according to the specified output of said motor, cutting output, with respect to usage ratio, the mean value of above-mentioned rotational speed and the inertia of above-mentioned turning axle of the specified output of said motor.
16. lathe according to claim 15 is characterized in that,
Above-mentioned change value setup unit is set the ratio of above-mentioned change amplitude and variable cycle according to following formula,
Q R = 45000 π 2 S 2 J ( 0.01 ePn - Pc )
Q: the change amplitude [%] of rotational speed
R: the variable cycle of rotational speed [s]
S: the mean value [min of rotational speed -1]
J: the inertia [kgm of turning axle 2]
Pn: the specified output [W] of motor
Pc: cutting output [W]
E: usage ratio [%].
17. any described lathe according to claim 14 is characterized in that,
Above-mentioned change value setup unit possesses the display unit that the curve map to the relation of representing above-mentioned change amplitude and variable cycle shows, on above-mentioned curve map, shows the position of current above-mentioned change amplitude and variable cycle and the related straight line of ratio of above-mentioned change amplitude and variable cycle respectively.
18. a lathe, it possesses the turning axle that is used to make instrument or Workpiece Rotating, and possesses the rotational speed that can make turning axle and change the unit according to the rotational speed of predetermined amplitude and cyclical swing, it is characterized in that,
Above-mentioned lathe possesses setup unit; Above-mentioned setup unit with the turning axle torque of above-mentioned amplitude or any side in the above-mentioned cycle and above-mentioned turning axle or to any side of the input electric power of the motor input that is used for making above-mentioned turning axle rotation as parameter; And can set the value of each parameter
The value of the above-mentioned parameter that above-mentioned rotational speed volatility unit sets according to above-mentioned setup unit makes the rotational speed change of above-mentioned turning axle.
19. lathe according to claim 18 is characterized in that,
Above-mentioned rotational speed change unit makes the absolute value of the angular acceleration under the value according to the above-mentioned parameter of setting absolute value that makes the angular acceleration under the situation that the rotational speed of above-mentioned turning axle quickens and the situation that makes its deceleration consistent on one side, Yi Bian rotational speed is changed.
20. lathe according to claim 18 is characterized in that,
Above-mentioned lathe possesses display unit, in this display unit, but on the plane that with each above-mentioned parameter is axle respectively, shows the regions and/or the currency of each above-mentioned parameter.
21. lathe according to claim 18 is characterized in that,
Above-mentioned lathe possesses: the 1st selected cell, and it is to selecting above-mentioned amplitude or in the above-mentioned cycle which side as above-mentioned parameter; And/or the 2nd selected cell, it is to selecting as above-mentioned parameter with the turning axle torque of above-mentioned turning axle or to which side of the input electric power of the motor input that is used for making above-mentioned turning axle rotation.
22. lathe according to claim 18 is characterized in that,
Above-mentioned lathe possesses the storage unit that the value of the above-mentioned parameter of setting through above-mentioned setup unit is stored.
CN201110398873.9A 2010-10-20 2011-10-20 Method for monitoring rotary shaft rotation speed fluctuation in lathe and monitoring arrangement, lathe Active CN102455685B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2010-235720 2010-10-20
JP2010235720A JP5507410B2 (en) 2010-10-20 2010-10-20 Method and apparatus for monitoring spindle rotational speed in machine tool, machine tool
JP2010237704A JP2012086347A (en) 2010-10-22 2010-10-22 Machine tool
JP2010-237704 2010-10-22
JP2010284815A JP5674449B2 (en) 2010-12-21 2010-12-21 Machine Tools
JP2010-284815 2010-12-21

Publications (2)

Publication Number Publication Date
CN102455685A true CN102455685A (en) 2012-05-16
CN102455685B CN102455685B (en) 2015-08-19

Family

ID=45923403

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110398873.9A Active CN102455685B (en) 2010-10-20 2011-10-20 Method for monitoring rotary shaft rotation speed fluctuation in lathe and monitoring arrangement, lathe

Country Status (4)

Country Link
US (1) US9010453B2 (en)
CN (1) CN102455685B (en)
DE (1) DE102011084875A1 (en)
IT (1) ITMI20111889A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054810A (en) * 2015-04-03 2016-10-26 发那科株式会社 Numerical control device having auto changing function for character display width
CN107533326A (en) * 2015-05-11 2018-01-02 三菱电机株式会社 Display device
CN108955868A (en) * 2017-05-22 2018-12-07 中国石油化工股份有限公司 A kind of underground drilling state identification method
CN112783088A (en) * 2019-11-01 2021-05-11 大隈株式会社 Device and method for monitoring spindle rotation speed in machine tool, and machine tool

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5705074B2 (en) * 2011-09-20 2015-04-22 オークマ株式会社 Method and apparatus for monitoring rotational speed of rotating shaft in machine tool, machine tool
JP5997577B2 (en) 2012-10-18 2016-09-28 オークマ株式会社 Chatter vibration suppressing method and machine tool
JP5908386B2 (en) * 2012-10-30 2016-04-26 オークマ株式会社 Machine Tools
CN104162749B (en) * 2013-05-17 2016-02-24 宝山钢铁股份有限公司 Many sliding bell clipping the ball threaded screw rod method for diagnosing status and the device for the method
JP6159196B2 (en) * 2013-08-26 2017-07-05 オークマ株式会社 Position controller for identifying low-frequency disturbances
JP6139392B2 (en) * 2013-12-11 2017-05-31 国立大学法人 東京大学 Processing method
JP6380924B2 (en) * 2014-01-06 2018-08-29 パナソニックＩｐマネジメント株式会社 Method of measuring moment of inertia of impact rotary tool and impact rotary tool using the measurement method
JP6603104B2 (en) * 2015-11-09 2019-11-06 オークマ株式会社 Machine Tools
JP2018073060A (en) * 2016-10-27 2018-05-10 オークマ株式会社 Diagnostic result display method in diagnostic apparatus and diagnostic apparatus
JP7082517B2 (en) * 2018-04-19 2022-06-08 株式会社ディスコ Processing equipment
JP7158008B2 (en) * 2018-09-06 2022-10-21 オークマ株式会社 Recovery mechanism and recovery method for processed product
JP7323758B2 (en) * 2018-11-22 2023-08-09 スター精密株式会社 lathe
JP6989564B2 (en) * 2019-04-26 2022-01-05 ファナック株式会社 Numerical control system for machine tools
JP7300369B2 (en) * 2019-10-30 2023-06-29 オークマ株式会社 MONITORING DEVICE AND MONITORING METHOD FOR SPINDLE SPEED IN MACHINE TOOL, MACHINE TOOL

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010082050A (en) * 2000-02-07 2001-08-29 가스야 쇼조 Apparatus for controlling the drive of machine tool
CN101310921A (en) * 2007-05-24 2008-11-26 大隈株式会社 Vibration suppressing device and vibration suppressing method for machine tool
CN101380719A (en) * 2007-09-06 2009-03-11 大隈株式会社 Vibration suppressing device for machine tool
CN101623835A (en) * 2008-07-08 2010-01-13 大隈株式会社 Vibration suppressing method and device
CN101722438A (en) * 2008-10-28 2010-06-09 大隈株式会社 Vibration suppressing method and vibration suppressing device for machine tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49105277A (en) 1973-02-08 1974-10-04
JPS613522Y2 (en) 1981-04-11 1986-02-04
JPS58165951A (en) 1982-03-26 1983-10-01 Okuma Mach Works Ltd Main shaft rotation control system in machine tool
JP2508501B2 (en) 1984-06-15 1996-06-19 ソニー株式会社 Black screwdriver
JP2960875B2 (en) 1995-10-11 1999-10-12 株式会社ツヅキ Window sash frame
JP3558508B2 (en) 1997-10-28 2004-08-25 東芝機械株式会社 Control device for NC machine tool
JP5665047B2 (en) 2010-10-27 2015-02-04 オークマ株式会社 Machine Tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010082050A (en) * 2000-02-07 2001-08-29 가스야 쇼조 Apparatus for controlling the drive of machine tool
CN101310921A (en) * 2007-05-24 2008-11-26 大隈株式会社 Vibration suppressing device and vibration suppressing method for machine tool
CN101380719A (en) * 2007-09-06 2009-03-11 大隈株式会社 Vibration suppressing device for machine tool
CN101623835A (en) * 2008-07-08 2010-01-13 大隈株式会社 Vibration suppressing method and device
CN101722438A (en) * 2008-10-28 2010-06-09 大隈株式会社 Vibration suppressing method and vibration suppressing device for machine tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054810A (en) * 2015-04-03 2016-10-26 发那科株式会社 Numerical control device having auto changing function for character display width
CN106054810B (en) * 2015-04-03 2018-11-27 发那科株式会社 The numerical control device of automatic change function with character display width
CN107533326A (en) * 2015-05-11 2018-01-02 三菱电机株式会社 Display device
CN107533326B (en) * 2015-05-11 2018-12-21 三菱电机株式会社 Display device
CN108955868A (en) * 2017-05-22 2018-12-07 中国石油化工股份有限公司 A kind of underground drilling state identification method
CN112783088A (en) * 2019-11-01 2021-05-11 大隈株式会社 Device and method for monitoring spindle rotation speed in machine tool, and machine tool
CN112783088B (en) * 2019-11-01 2024-03-22 大隈株式会社 Device and method for monitoring spindle rotation speed in machine tool, and machine tool

Also Published As

Publication number Publication date
US9010453B2 (en) 2015-04-21
US20120097411A1 (en) 2012-04-26
ITMI20111889A1 (en) 2012-04-21
DE102011084875A1 (en) 2012-04-26
CN102455685B (en) 2015-08-19

Similar Documents

Publication Publication Date Title
CN102455685A (en) Method for monitoring rotary shaft rotation speed fluctuation in machine tool, monitor apparatus, and machine tool
CN102407490B (en) Equipment for inhibiting of vibration
CN102554685B (en) Vibration suppressing method in lathe and equipment for inhibiting of vibration
CN102452022B (en) The supervision method of lathe, monitoring arrangement and lathe
JP5793200B2 (en) Machine tool cutting force detection device, cutting force detection method, machining abnormality detection method, and machining condition control system
CN101380719B (en) Vibration suppressing device for machine tool
CN102528556B (en) Lathe
CN103419076B (en) The processing vibration suppressing method of lathe and processing equipment for inhibiting of vibration
CN103329055B (en) Machining error computation device, machining error computation method, machining control device and machining control method
CN103009187A (en) Monitoring method and monitor apparatus for monitoring rotation speed of rotary shaft in machine tool, and machine tool
CN107000152B (en) Numerical control device
CN105209991A (en) Numerical control apparatus
JP5507410B2 (en) Method and apparatus for monitoring spindle rotational speed in machine tool, machine tool
CN108732989A (en) Swing the control device of the lathe of cutting
US9651936B2 (en) Machining method
CN103853099B (en) The Servocontrol device of position correction function with driven member
CN107390639A (en) Swing the Servocontrol device and control method of the lathe of cutting
CN100477479C (en) Motor controller
CN103201069B (en) Cutting resistance analysis device, cutting device equipped with same, and cutting resistance analysis method
CN103392156A (en) Processing control apparatus, and processing control method
CN103785906A (en) Machine tool
CN103785905A (en) Machine tool
CN104768684A (en) Machine tool control device and machine tool
JP5674449B2 (en) Machine Tools
EP2761135B1 (en) Device machining materials by milling or drilling, and method therefor

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant